Torchato di tella



T. DI TELLA LIQUID DISPENSING APPARATUS Jan 27, 1931'.

Filed March '7. 1929 WMU A Jmmkw dtbm T: if;a; 9 A w m M D m 1 m A f u Patented Jan. 27, 1931 ronouero DI TELLA, os BUENOS AIRES, ARGENTINA LIQUID-DISPENSING APPARATUS Application filed March 7,

The present invention relates to a safety device applicable to all kind of apparatus for measuring and discharging liquids in predetermined quantities, which device has been specially devised with a view to provide for the necessity of actual overflow before the measured liquid may be discharged, the said device being constituted by a flap valve or the like situated either in the interior of the overflow pipe or in a branch thereof.

in the accompanying drawing,

Fig. 1 shows the complete device in its initial position, that is to say, during a charging operatlon.

Fig. 2 shows the positions of the parts constituting the device in question when the overflow is taking place, and

Fig. 3 illustrates the device when, after the completion of the overflow operation, the discharge operation is rendered possible; all three figures being vertical sectional views.

In the following description, like or corresponding parts have been desi nated by sim ilar characters of reference on the drawing.

Referring more particularly to said drawin g, 1 is the transparent measuring vessel, 2 the overflow pipe, 3 a pipe to which the pipe 2 is immediately connected and constituting an extension or prolongation thereof, 1 is the discharge pipe, 5 the flap or like valve, and 6 designates a lever rigidly connected to a valve 5 and provided with a counterweight 7. 8 is a locking lever, 9 designates a counterweight on the locking lever, 10 is an upper projection on the said locking lever which prevents the valve from returning to its original position, and 11 is a lower projection or lug for preventing the return of the lock-' ing lever to its original position, 12 designates a disc rigidly connected to the spindle of the discharge valve 14-. 13 is a tooth on the said disc for returning the locking lever 8 to its original position, and 15 indicates the operating handle of the discharge valve 14.

The mechanism operates in the following manner :The vessel 1, which constitutes a measuring chamber, is filled with liquid which enters through pipe 16 until the level of the liquid has passed the upper end of the overflow pipe 2, whereupon the liquid 'riphery .of disc 12 (Fig.

1929. Serial No. 345,156.

enters the said pipe 2 and flows into the chamber of the valve 5, through which chamber the excess or overflowing liquid travels, thus imposing its weight upon the valve which is thereby caused to raise the lever 6, the pro- I jection 10 no longeropposing the movement of the locking lever 8 which, actuated by its counter Weight a), swings upon its pivot 19 until said weight is arrested by the stop 18. v In these conditions the valve 5 cannot descend 604 i completely, due to the projection 10 engaging a depending lug on lever 6 which then emerges into its path (see Fig. 2), At this time, a second lug or tooth 61 on lever 6 is I p out of engagement with a notch 17 in the disc 12 which,therefore, is free to rotate, and the 7 opening of the discharge valve 14 is thus possible and is effected by clockwise movement of the handle 15. Upon rotation of said han- N the 15, which is rigidly connected with disc 12, the tooth 13 of the latter engages the projection l1 and swings thelever 8 back into its initial position, thus releasing the valve,

the tooth 61 on the levernow engaging the pe- 'It' 's apparent that when commencing the closing of the discharge valve, in order to effect a further discharge operation, the operator will have to continue the aforesaid movement of the handle through a full stroke 30 or revolution, since the tooth 61 of the lever 6 only permits rotation. in a counter-clockwise direction in view of the opposition made by the'teeth20 provided on disc 12. Accord- I ingly, the manipulation in a contrary direc- 35 tion, at any intermediate position, is impossible,'the lever 15 beinglocked at the end of its path by the tooth 61 entering the notch 17 in disc 12, and it is thus impossible to actuate the lever 15 in any direction unless a further 9 operation of the machine is initiated.

Hence, it is obviously necessary that there be an actual overflow of the liquid since, if such is not the case, the discharge cannot be effected, and there is no possibility of placing 1 the parts in intermediate positions.

As will be observed, the invention may be applied to liquid dispensing machines provided with a fixed or a movable overflow pipe in its measuring-chamber, as well as in the 10 case where the measuring chamber is of con stant volume and is provided with a drain, since in these three cases it need only be assumed that the valve 5 is located at the interior or in a branch of the discharge outlets indicated in dot-and-dash lines in the draw inp; (Fig. 1).

The invention is manifestly not limited to the precise form shown in the drawing, but may be constructed in various other forms within its scope as claimed.

I claim as my invention 1- 1. Apparatus for dispensing liquids comprising a dispensing vessel provided with an outlet and also with an overflow device to determine the quantity of liquid to be dispensed; a chamber in direct communication with the overflow device to receive overflowing' liquid; a movable valve in said chamber subjected to the weight of the overflowing liquid to be actuated thereby; a valve for said outlet; a member for manipulating the outlet valve; a locking; lever associated with said outlet valve; and a lever connected to be operated by the first-named valve and itself controlling the operation of the locking lever.

2. Apparatus for dispensing liquids comprising a dispensing vessel provided with an outlet and also with an overflow device to determine the quantity of liquid to be dispensed; a chamber in direct communication with the overflow device to receive overflowing liquid; a movable valve in said chamber subjected to the weight of the overflowing liquid to be actuated thereby; a movable valve for said outlet; a member for manipulating the outlet valve; a disc connected to move with id outlet valve; a lever connected to be operated by the first-named valve; and a locking lever interposed between said disc and the valve-operated lever to control the operation of the former; the locking lever having upper and lower projections for cooperation, respectively, with said valve-operated lever and said disc.

3. Dispensing apparatus according to claim 2, in which the locking lever carries a weight for rocking it in one direction about its fulcrum means being provided for limiting such rocking movement.

4. Dispensing apparatus according to claim 2, in which the valve-operated lever is provided with a tooth for engagement in raperipheral notch in the disc prior to its operation by the associated valve, but releasable from said notch when such operation takes place.

Intestimony whereof I aflix my signature.

TOR-GUATO DI= TELLA. 

